ESP32-C3 SuperMini V2 is an IoT mini development board based on ESP32-C3 WiFi/Bluetooth dual-mode chip.It has excellent RF performance and supports IEEE 802.11 b/g/n WiFi and Bluetooth 5 (LE) protocols. Onboard antenna interface and RGB module. It also has a small and exquisite appearance combined with a single-sided surface mount design.It supports UART, I2C and SPI and other four serial interfaces. There is also a small reset button and a bootloader mode button on the board. ESP32C3SuperMini is a high-performance, low-power, cost-effective IoT mini development board suitable for low-power IoT applications and wireless wearable applications. If external power supply is required, just connect the external power supply + level to the 5V position and GND to the negative pole. (Support 3.3-6V power supply). Remember that when connecting the external power supply, you cannot connect to the USB. Only one of USB and external power supply can be selected. NOTE: Enter download mode: Press and hold the BOOT button of ESP32C3, then press the RESET button, release the RESET button, and then release the BOOT button. At this time, ESP32C3 will enter download mode. (You need to re-enter download mode every time you connect. Sometimes you press it once, the port will be unstable and disconnected. You can judge it by the port recognition sound) The esp32c3supermini serial port cannot print. Solution: In the for arduino environment, remember to turn on cdc on boot when using direct USB connection, and remember to turn off cdc on boot when using USB to serial port. Colour:Black Material:PCB Package Contents: 1x Development Board with soldered pin headers Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.